Comment 2 for bug 180218

Okay, after discussing the problem big-picture with Julian we have agreed on the following implementation plan:

 1. Make {IDSSPR, IDASBPR}.current_published to return the the latests PUBLISHED or PENDING publication in its context
      * it will reduce the ancestry race-condition upload-time and override-time.
      * Yes, the property name is horrible, but we don't have time to fix it right now.

 2. Before accepting a upload (source or binary any arch) we will also try to find a ancestry in ACCEPTED queue, if found we will use its overrides.
     * it will propagate queue binary overrides across all architectures.

 3. We will lookup the full binary chain by name before overriding, instead of using IDSSPR.binaries directly
     * It will fix the inconsistencies for FTBFS.

I hope it is still sounding correct during the implementation.